protected override Expression VisitBinary(BinaryExpression node)
{
if (node.NodeType != ExpressionType.Equal)
{
return(null);
}
ValueToAggregateVisitor <TIn> visV = new ValueToAggregateVisitor <TIn>();
visV.Visit(node.Left);
this.FilteredPropertyInfo = visV.SourcePropertyInfo;
ConstantVisitor <TIn> visC = new ConstantVisitor <TIn>();
visC.Visit(node.Right);
this.Filter = visC.Filter;
return(null);
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
var aggregationInstanceAttribute = node.Method.GetCustomAttribute <AggregationInstanceAttribute>();
if (aggregationInstanceAttribute == null)
{
throw new InvalidOperationException();
}
this.AggregationInstanceType = aggregationInstanceAttribute.AggregationInstanceType;
if (node.Arguments.Count > 0)
{
ValueToAggregateVisitor <TIn> vis = new ValueToAggregateVisitor <TIn>();
try
{
vis.Visit(node.Arguments[0]);
this.SourcePropertyInfo = vis.SourcePropertyInfo;
}
catch { }
}
return(null);
}